There isn’t a Glide version of Quake. John Carmack didn’t want to do endless vendor specific API variants of Quake after an early Rendition Verite port burned him, so just released Glquake and said vendors should support standard APIs.

3DFX had a mantra of “no CAD” so didn’t support OpenGl, as they saw it as a primarily aimed at running CAD software etc. So therefore they had to come up with the somewhat hacky MiniGL to implement enough of OpenGL to get Quake to actually run.

That's because CAD graphics for games where a very different beast. NV Quadro cards would maintain far more objects being rendered but with slower FPS' as a CAD rendering wouldn't requiere real time FX with constant changes everywhere. If you have a look at GLIDE games the effects somehow look 'prettier' and the lights more 'alive'.

/u/sdz-mods - the person doing the 3DFX port to Irix - reported just now that they got MesaFX up and running and that'll serve as the basis of a "MiniGL" to get the port done. ;) So, there is hope!